#516BAB
Closest named color: French Blue (#436BAD). oklch(53.7% 0.105 266.2), rgb(81, 107, 171).
Aa
White text reads best on this color (5.19:1).
About this color
#516BAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.105 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.016 away. White text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #516BAB |
| RGB | rgb(81, 107, 171) |
| HSL | hsl(223, 36%, 49%) |
| OKLCH | oklch(53.7% 0.105 266.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #516BAB | 5.19:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #516BAB | 4.04:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #516BAB text on white | 5.19:1 | AA | Lc 75.6 | Fine for body text |
| #516BAB text on black | 4.04:1 | AA large text | Lc -26.1 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1E0
oklch(81% 0.047 264.9)
-
Step 400
400
#8BA0D1
oklch(70.8% 0.076 266.5)
-
Step 500
500
#6E88C5
oklch(63.2% 0.097 266)
-
Step 600
600 (this color)
#516BAB
oklch(53.7% 0.105 266.2)
-
Step 700
700
#475E98
oklch(49.1% 0.097 266.5)
-
Step 800
800
#3A4D7C
oklch(42.7% 0.082 266.3)
-
Step 900
900
#324063
oklch(37.6% 0.063 266.8)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#516BAB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #5271AE | 0.017 |
| Deuteranopia (no green cones) | #4869AA | 0.013 |
| Tritanopia (no blue cones) | #267983 | 0.094 |
| Achromatopsia (no color) | #6D6D6D | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516BAB
#516BAB
oklch(53.7% 0.105 266.2)
- #89680E
#89680E
oklch(53.6% 0.105 85.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #516BAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.016
- Flat Blue #3C73A8 ΔE 0.031
- Muted Blue #3B719F ΔE 0.037
- Mid Blue #276AB3 ΔE 0.042
- Dull Blue #49759C ΔE 0.042
- Windows Blue #3778BF ΔE 0.046
- Dusky Blue #475F94 ΔE 0.049
- Nice Blue #107AB0 ΔE 0.057
Use #516BAB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.